喷油比对复合喷射汽油机暖机过程燃烧和排放的影响*

doi:10.19562/j.chinasae.qcgc.2020.06.002

汽车工程 ›› 2020, Vol. 42 ›› Issue (6): 718-724.doi: 10.19562/j.chinasae.qcgc.2020.06.002

喷油比对复合喷射汽油机暖机过程燃烧和排放的影响^*

孙平¹, 刘泽¹, 刘少振¹, 于秀敏¹, 曹智¹, 杨松²

1.吉林大学,汽车仿真与控制国家重点实验室,长春 130022;
2.加拿大滑铁卢大学工程学院,滑铁卢 N2L 3G1

收稿日期:2019-07-18 出版日期:2020-06-25 发布日期:2020-07-16
通讯作者: 于秀敏,教授,博士,E-mail:yuxm@jlu.edu.cn
基金资助:
国家自然科学基金(51276079)和移动源污染排放控制技术国家工程实验室(NELMS2018A19)资助

Effect of Injection Ratio on Combustion and Emission ofCombined Injection Gasoline Engine During Warm-up Process

Sun Ping¹, Liu Ze¹, Liu Shaozhen¹, Yu Xiumin¹, Cao Zhi¹, Yang Song²

1. Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130022;
2. Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1

Received:2019-07-18 Online:2020-06-25 Published:2020-07-16

摘要/Abstract

摘要： 在一台复合喷射汽油机上进行了不同喷射方式的暖机试验,研究了不同的喷油比对复合喷射汽油机暖机过程中燃烧和排放特性的影响。结果表明,随着冷却液温度的升高,汽油机燃烧和排放性能逐渐改善,喷油比为80%时发动机性能最佳,与纯直喷相比,使暖机过程缸压峰值平均提高了49.1%,HC排放降低了14.5%,CO排放降低了27.1%,NO_x排放上升了56.6%,PN排放降低了92.5%。随着暖机过程冷却液温度的升高,发动机燃烧改善,HC、CO排放和微粒总数逐渐减少。

关键词: 汽油机, 复合喷射, 暖机过程, 燃烧, 排放

Abstract: A warm-up test of different injection schemes is carried out on a combined injection gasoline engine to study the effects of different injection ratios on the combustion and emission characteristics of the combined injection gasoline engine in warm-up process. The results show that with the rise of coolant temperature, the combustion and emission performances of the gasoline engine gradually improve. When injection ratio is 80%, the engine achieves the best performance, with the peak of cylinder pressure increases by 49.1%, HC emission decreases by 14.5%, CO emission reduces by 27.1%, NO_x emission rises by 56.6%, and PN emission lowers by 92.5% on average in warm-up process, compared with pure direct injection scheme. With the rise of coolant temperature in warm-up process, the combustion of engine improves, and the emissions of HC, CO and total particulates gradually reduce

Key words: gasoline engine, combined injection, warm-up process, combustion, emission

孙平, 刘泽, 刘少振, 于秀敏, 曹智, 杨松. 喷油比对复合喷射汽油机暖机过程燃烧和排放的影响^*[J]. 汽车工程, 2020, 42(6): 718-724.

Sun Ping, Liu Ze, Liu Shaozhen, Yu Xiumin, Cao Zhi, Yang Song. Effect of Injection Ratio on Combustion and Emission ofCombined Injection Gasoline Engine During Warm-up Process[J]. Automotive Engineering, 2020, 42(6): 718-724.

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喷油比对复合喷射汽油机暖机过程燃烧和排放的影响^*

Effect of Injection Ratio on Combustion and Emission ofCombined Injection Gasoline Engine During Warm-up Process

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